Nope, not Akagi. I'd put my bet on an adult Zuikaku. It's because of the muneate at the last panel. Changing tag...
... There's no fish here, you know.... Sorry butAh so there you were, Kaga-sanI don't have any more feed leftHaaThen why are you doing something so pointless?I know that alreadyKaga-san, you're such an idiotPerhaps one day the fish might return hereThat reminds me.[Zuikaku],I've been looking for you~*Sigh-*The Wa-Class devoured all of them... If you say that him, I'll kill youZuI thought those days would continue forever.It's so like her to not even leave a single photo behindIt's still more meaningful than talking to youI wanted to stay with you foreverToday's the anniversary of her death